4738155921 has 6 divisors (see below), whose sum is σ = 6844003010. Its totient is φ = 3158770608.

The previous prime is 4738155911. The next prime is 4738155931. The reversal of 4738155921 is 1295518374.

4738155921 is a `hidden beast` number, since 4 + 73 + 8 + 1 + 559 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (4738155911) and next prime (4738155931).

It can be written as a sum of positive squares in only one way, i.e., 4350853521 + 387302400 = 65961^2 + 19680^2 .

It is not a de Polignac number, because 4738155921 - 2¹⁸ = 4737893777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4738155911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 263230876 + ... + 263230893.

Almost surely, 2^4738155921 is an apocalyptic number.

It is an amenable number.

4738155921 is a deficient number, since it is larger than the sum of its proper divisors (2105847089).

4738155921 is a wasteful number, since it uses less digits than its factorization.

4738155921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526461775 (or 526461772 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 4738155921 is about 68834.2641494772. The cubic root of 4738155921 is about 1679.5893649871.

The spelling of 4738155921 in words is "four billion, seven hundred thirty-eight million, one hundred fifty-five thousand, nine hundred twenty-one".